The nurse is administering warfarin (Couma
问题:
The nurse is administering warfarin (Coumadin) to a client with deep vein thrombophlebitis. Which laboratory value indicates warfarin is at therapeutic levels ?()
A.Partial thromboplastin time (PTT) to 2 times the control.
B.Prothrombin time (PT) to 2 times the control.
C.International normalized ratio (INR) of 3 to 4.
D.Hematocrit of 32%.